src/main/drivers/bus_i2c.h

   1 /*
   2  * This file is part of Cleanflight.
   3  *
   4  * Cleanflight is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * Cleanflight is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with Cleanflight.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #pragma once
  19
  20 /*
  21 #define I2C_SHORT_TIMEOUT            ((uint32_t)0x1000)
  22 #define I2C_LONG_TIMEOUT             ((uint32_t)(10 * I2C_SHORT_TIMEOUT))
  23 #define I2C_DEFAULT_TIMEOUT          I2C_LONG_TIMEOUT
  24 */
  25 #define I2C_TIMEOUT                  (10000)
  26
  27 #include "drivers/io_types.h"
  28 #include "drivers/rcc_types.h"
  29
  30 typedef enum {  // Weird mapping to keep config compatible with previos version
  31     I2C_SPEED_100KHZ    = 2,
  32     I2C_SPEED_200KHZ    = 3,
  33     I2C_SPEED_400KHZ    = 0,
  34     I2C_SPEED_800KHZ    = 1,
  35 } I2CSpeed;
  36
  37 typedef enum I2CDevice {
  38     I2CINVALID = -1,
  39     I2CDEV_EMULATED = -1,   // Hack until we have proper I2C abstraction
  40     I2CDEV_1   = 0,
  41     I2CDEV_2,
  42     I2CDEV_3,
  43 #ifdef USE_I2C_DEVICE_4
  44     I2CDEV_4,
  45 #endif
  46     I2CDEV_COUNT
  47 } I2CDevice;
  48
  49 typedef struct i2cDevice_s {
  50     I2C_TypeDef *dev;
  51     ioTag_t scl;
  52     ioTag_t sda;
  53     rccPeriphTag_t rcc;
  54     I2CSpeed speed;
  55 #if defined(STM32F7)
  56     uint8_t ev_irq;
  57     uint8_t er_irq;
  58     uint8_t af;
  59 #endif
  60 } i2cDevice_t;
  61
  62 void i2cSetSpeed(uint8_t speed);
  63 void i2cInit(I2CDevice device);
  64 bool i2cWriteBuffer(I2CDevice device, uint8_t addr_, uint8_t reg_, uint8_t len_, const uint8_t *data, bool allowRawAccess);
  65 bool i2cWrite(I2CDevice device, uint8_t addr_, uint8_t reg, uint8_t data, bool allowRawAccess);
  66 bool i2cRead(I2CDevice device, uint8_t addr_, uint8_t reg, uint8_t len, uint8_t* buf, bool allowRawAccess);
  67
  68 uint16_t i2cGetErrorCounter(void);